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Things You Need To Know About PET Scan

There are questions with regard to PET-Scan. By and large the name of the scan in English is "positron emission tomography”. In nuclear medicine exam often called PET or positron emission tomography. The process of PET scan is pretty much the same as scintigraphy wherein the analyzing the functioning of an organ or a structure of the body is done by using a contrast product injected into the patient. The radiotracer gets activated by coming in contact with the organs and in the presence of an anomaly.

pet-scan

Images of these reactions are captured by a machine and reproduced on a computer screen. The three-dimensional reconstruction makes it possible to visualize the zones of high concentration of the tracer (zones in red). The doctor can identify an abnormality or pathology. As one of the primary advantage, A PET scan allows the obtaining of 3D cuts, which is not the case of scintigraphy. This comes out as a useful method in oncology for detecting or monitoring a tumor.

Why prescribe a tomography?

PET CT scan is mainly prescribed:

  • For the detection of metastases, to know the effectiveness of treatment put in place or to confirm a tumor recurrence when a blood test revealed an increase in tumor markers.
  • In cardiology to study the functioning of the myocardium (for example after a heart attack) or coronary arteries
  • In neurology to confirm the presence of brain damage and degenerative disease such as Alzheimer's or Parkinson's disease.

How does a PET scan work?

In terms of the time duration, the PET scan takes about two hours. Intravenous injection of the radioactive substance is the first step. The patient is kept laid down for one hour in a usual basis. It is the standard time required in order to have the contrast material to enter the body and reach the organs to be examined. The patient is then placed for about twenty minutes in a machine equipped with a ring-shaped opening whilst they are still lying on their back. That's when PET images are created. The results cannot be put out or discussed immediately as it takes some time for study and analysis of the image.

Some of the health conditions determined in PET scan are:

  • The presence and nature of tumor lesions, recurrence of the disease or metastasis of cancer at an early stage;
  • The presence of vascular disorders, post-traumatic changes, foci of epilepsy and Parkinsonism in the brain, as well as causes of dementia;
  • The viability of the myocardium (heart muscle) in ischemic heart disease, congenital heart defects.
What Is PET/CT And What Are Its Benefits?

PET (Positron Emission Tomography) and CT (Computed Tomography) devices are used together to get metabolic and anatomical data about organs. Positron emission tomography (PET) is an imaging test that assists determine how your tissues and organs function. The PET scan uses a radioactive drug (tracer) to demonstrate this activity.

This tracer can be injected in the body, swallowed or inhaled, depending on the organ or tissue to be examined by PET scanning. The tracer is collected in body areas with a high level of chemical activity, often corresponding to disease areas. In a PET scan, these areas appear as bright spots. The PET CT scan is useful in detecting or evaluating a variety of disorders, including certain cancers, heart disease, and brain disorders.

Why PET / CT Scanning?

PET CT scan in Delhi is an effective way to detect chemical activity in body areas. Some cancers can help identify various disorders, including heart disease and brain disorders. Images obtained from PET scanning provide different information than those obtained by other scanning methods like computed tomography (CT) or magnetic resonance imaging (MRI). A PET scan or combined CT-PET scan will allow your doctor to better diagnose your condition.

Cancer

Since cancer cells have a higher metabolic rate than normal cells, they appear as bright spots in PET scans. PET scans may be useful for:

  • Detection of cancer
  • Detecting whether your cancer has spread
  • To check whether cancer treatment works.
  • Determination of cancer recurrence.

PET scans should be interpreted with caution because non-cancerous disorders appear to be cancerous and many types of cancer do not appear in PET scans.

Heart disease

PET scans can show areas in the heart where blood flow is reduced: This information can help you and your doctor in deciding whether you will benefit from a procedure to open a clot-blocked heart artery (angioplasty) or coronary artery bypass surgery.

Brain disorders

PET CT scan in Delhi can be used to assess specific brain disorders, such as:

  • Tumours
  • Alzheimer's disease
  • Seizures

What are the advantages and risks associated with PET/CT?

Benefits

Nuclear medicine examinations provide specific information that cannot often be obtained by other imaging methods, including information about both the body's function and anatomical structure.

Nuclear medicine examinations provide the most useful information for diagnosing and, if available, determining the appropriate treatment for many diseases.

Nuclear medicine is less costly than surgical exploration and can provide more accurate information.

Nuclear medicine often offers the potential to detect disease at the earliest stage before symptoms appear or abnormalities are detected by other diagnostic tests.

PET scans can detect the possibility of benign or malignant lesions, eliminating the need for surgical biopsy or identifying the best biopsy site.

PET scans may also provide additional information used in radiation therapy planning.

PET CT Scan For Cancer, Heart Problems, Brain Disorders, Nervous System Diagnosis

pet scan for cancer

What is a PET Scan?

PET is a positron emission tomography that makes your doctor check your body for various diseases. In this type of a scan special dyes are used and these dyes have radioactive tracers. After the tracers are injected into a vein of your arm, your organs and tissues start absorbing the tracer. Your body is put under a PET scanner and your doctor is able to find out whether your organs and tissues are working appropriately or not. The PET CT scan helps your doctor to find the blood flow, usage of the oxygen and usage of the sugar by your body, glucose metabolism and many more diseases.

This procedure is an outpatient procedure which implies that you are allowed to go back home after the completion of the procedure.

Why is the PET Scan done?

The PET scan is done to diagnose whether you are suffering from the following diseases or not-

Though other imaging tests like the CT scan and the MRI are also beneficial yet PET scans are able to diagnose the problems persisting at the cellular level. This enables the doctor to very clearly view the diseases called as the complex systemic diseases like

  • Brain tumours
  • Seizures
  • Memory disorders
  • Coronary artery disease
  • Lung Cancer Lymph Nodes
  • PET scan for diabetics

When PET is used for diagnosing the cancer, it helps your doctor to view very clearly the metabolization of the cancer and to know the areas to which the cancer has spread. The response of the tumour to the chemotherapy is also shown using the PET.

What is the procedure of the PET Scan?

During the PET scan procedure, you’ll either be given a gas to inhale or else a solution to drink. You might be given tracers via a vein in your arm. For absorbing the tracers, your body would need some time, therefore, you’ll be asked to wait for about an hour tentatively before the beginning of the scan.

Now you’ll be made to lie on a narrow table and this table would be attached to the PET machine. The table will be made to glide into the machine. This would be a slow procedure.

You’ll be asked not to move at all during the scan. You’ll also be asked not to breathe for some time. While the test would be on, you’ll be made to hear buzzing and clicking noises.

When all the important images would be recorded, you’ll be made to slide out of the machine. Your test would have completed.

After the test gets completed, you’ll be asked to carry on your normal day. You might be given certain instructions by the doctor. You’ll be asked to drink ample fluids for letting you flush the tracers out of your body’s system. Mostly, it takes about two days to let all the tracers leave your body.

When will you get your PET CT Scan results?

PET scan results would be available within 24-48 hours. A trained specialist will be asked to interpret the images of the PET. This information will be shared will your doctor. Your doctor with you will go through your results at your follow up appointment.

How should you prepare yourself for the PET scan?

Complete instructions will be given to you by your doctor for the PET scan preparation (rules). You should reveal your prescriptions and the medicines being taken by you to your doctor. You will not be allowed to eat anything for more than eight hours before the procedure takes place though you’ll be allowed to drink water.

In case if you are pregnant, you should tell your doctor because the test could be unsafe for your baby. You’ll be given special instructions for your test in case if you are Diabetic because fasting may impact your sugar levels of the blood.

Hospital will provide you with a gown to wear and will ask you to remove your jewellery as metal can be an interference in the procedure.

How much would the PET Scan Cost?

You can get the PET scan of your chest, brain or the whole body done at various diagnostic centres associated with 3HCare. Cost of PET CT scan can differ at different labs. To get a transparent and competitive pricing for your scan, logon to 3H Care portal and book your test.

To know more about the price of a PET scan in different cities in India click lowest PET Scan price

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